The Application of Automated SEM-Based Identification of Detrital and Diagenetic Mineral Phases in Offshore Cuttings from the Labrador Sea - Looking for the Source
- Derek Wilton (Earth Sciences, Memorial University) | Martin Feely (National University of Ireland) | James Carter (Nalcor Energy - Oil & Gas) | Alessandra Costanzo (National University of Ireland) | Jon Hunt (National University of Ireland)
- Document ID
- Offshore Technology Conference
- Arctic Technology Conference, 24-26 October, St. John's, Newfoundland and Labrador, Canada
- Publication Date
- Document Type
- Conference Paper
- 2016. Offshore Technology Conference
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- 51 since 2007
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MLA-SEM analyses can quantitatively define the modal mineralogy of detrital components in a variety of sample material including offshore well cuttings such that the possible source(s) of the detrital material might be ascertained. The MLA data can be queried for combinations of detrital minerals that might reflect a specific source terrane (e.g., igneous suite, metamorphic complex, etc.). In some cases, minerals may be identified that might have a unique sediment source region. The MLA data can also be examined to evaluate whether trends of changing detrital mineral compositions through time (i.e., stratigraphically) can be documented that may reflect regional changes in the level of tectonism, potential unroofing a given sediment source area, and/or shifts between sediment source areas. The MLA analyses can be used to produce maps of radiometrically dateable mineral phases within a given sample, that might be used to derive radiometric dates.
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Curtis, C. D., Cope, J. C. W., Plant, D., MacQuaker, J. H. S., 200. ‘Instantaneous’ sedimentation, early microbial sediment strengthening and a lengthy record of chemical diagenesis preserved in Lower Jurassic ammonitiferous concretions from Dorset. Journal of the Geological Society, London, v. 157, pp. 165-172.
Feely, M.Costanzo, A., Hunt, J., Wilton, D., and Carter, J., 2016. Oil Exploration and its Relationship to the World of Trapped Micron Scale Fluids: A Review of the Applications of Fluid Inclusion Microscopy to the Study of Aqueous and Hydrocarbon Fluid Dynamics in Sedimentary Basins. Offshore Technology Conference proceedings, St John’s, Newfoundland and Labrador, 24-26th October 2016.
Grant, D. C., Goudie, D. J., Shaffer, M., and Sylvester, P. 2016. A single step trans-vertical epoxy preparation method for maximising throughput of iron-ore samples via SEM-MLA analysis. Applied Earth Science: Transactions of the Institutions of Mining and Metallurgy: Section B, v.125 (1), pp. 57–62.
Wilton, D. H. C., Thompson, G. M., and Evans-Lamswood, D., 2015. MLA-SEM examination of sulphide mineral breakdown and preservation in till, Voisey’s Bay Ni-Cu-Co deposit, Labrador - The distribution and quantitative mineralogy of weathered sulphide phases in a transect from massive sulphide through gossanous regolith to till cover. in Environmental and Economic Significance of Gossans, (ed.) M. -C. Williamson; Geological Survey of Canada, Open File 7718, p. 31–41.
Wilton, D. H. C., and Winter, L. S., 2012. SEM-MLA (Scanning Electron Microprobe-Mineral Liberation Analyser) research on indicator minerals in glacial till and stream sediments: An example from the exploration for awarauite in Newfoundland and Labrador; Quantitative Mineralogy and Microanalysis of Sediments and Sedimentary Rocks. Mineralogical Association of Canada Short Course Series v. 42, pp. 265–283.